Lambda Research Corporation, a leading publisher of illumination and optical design software, announces the 19.4 release of its TracePro® 2019 software for Illumination and Non-Imaging Optical Design & Analysis. This new release of TracePro has enhancements to the Flux report and new Scheme macro commands. The menu structure and toolbars have been reorganized and improved. The Texture Optimizer, for optimizing the textured surfaces commonly used on display backlights and illuminators, has been enhanced with new features and texture types. As usual, incremental improvements to the Interactive Optimizer enhance its functionality for optimizing non-imaging systems while using operands such as irradiance/illuminance distributions, candela distributions, color, luminance, and more.